v0.45.0 stable bundles terminal hardening, session-context cleanup, and an MCP blacklist-bypass fix

What this changes for operators

• Operators on preview or older stable builds get a single upgrade decision: move to v0.45.0 to pick up Termux relaunch/resize fixes, session-context filtering on history resume, sequential tool execution for update_topic, Vim keybinding fixes, and an MCP blacklist-bypass prevention fix.
• The MCP blacklist-bypass prevention is the security-bearing item: it closes a path where a blacklisted MCP tool/server could still be reached, so operators relying on MCP allow/deny controls should upgrade before trusting the blacklist.
• Verification path: release tag v0.45.0 notes (published 2026-06-03T01:05:14Z) enumerate the bundled fixes.
• Single composite upgrade decision - bundled small fixes all gated on 'upgrade to v0.45.0' stay one signal.